It comes as large areas of northern Europe are facing drought after one of the driest European springs on record.

But not all areas of the UK have suffered from the dry weather. Scotland has had 20% more rain than usual for spring, while snow flurries were reported at the summit of Mount Snowdon in north Wales.

Water-saving tips

Wash a car using a bucket

Reuse bath water on plants and in your garden

Let your grass grow

Keep a jug of water in the fridge instead of running a cold tap

Don't let water waste while waiting to get into a shower

Source: Environment Agency

Environment Secretary Caroline Spelman has held a second drought summit to review the impacts of the continuing dry weather.

She said: "Water companies are confident that supplies are high enough so that widespread restrictions to the public are unlikely. We're doing all we can to reduce the impact on agriculture and wildlife, but everyone can play their part.

"Households know how to use less water and everyone can do their bit to use water more wisely, not only through the summer, but throughout the year."

Low levels of water are causing considerable problems for farmers, with crop yields being hit.

In parts of the Fens, some farmers and growers have volunteered to irrigate only at night to reduce evaporation, and co-operatives have formed to share limited amounts of water available.

Image caption
Bewl Water in Kent is at 80% of its capacity after some areas of the UK saw just 4mm of rain in May

Ahead of talks with the government later, Peter Kendall, president of the National Farmers Union, told BBC Radio 4's Today programme there was a need to look at long-term solutions such as having enough reservoirs and "computer-controlled drip feed irrigation".

Mr Kendall said there would be calls for an approach in which authorities "talk to farmers in advance" and "don't just turn the tap right off" to "allow farmers to eke out supplies".

He said: "It would be crazy if you have a big investment and you say 'no water from now on'.

"We would much rather say, 'Actually, it's getting low, you can have 30% or 40% of your water.'

"That's the sort of initiative we need and then we need to look longer term at how we can plan to become more resilient."

The NFU president urged ministers to "keep talking to the farmers" and "make sure we make food production a priority".

'Strategic' response

The British Retail Consortium's food director, Andrew Opie, said: "Farming is an uncertain business. Few years have a perfect pattern of weather and retailers are again working with suppliers to make sure there continues to be affordable food in the shops.

"East Anglia is prone to dry weather and there will be more of these conditions in the future. Many large producers have already invested in private irrigation systems to deal with low rainfall and make sure crops grow successfully."

He pointed out that, although the weather had created a problem for some commodities, such as wheat and other cereals, the dry conditions have produced bumper crops of foods such as raspberries and asparagus.

Craig Bennett, of environmental campaign group Friends of the Earth, said most water companies had "dramatically improved their efforts to reduce leakage", despite the failure of a few to meet their targets.

But he was critical of the overall approach taken by successive governments.

He said: "Although water companies generally have upped their game, government has completely failed to up its game. We have seen successive governments fail to address this issue properly."

"Mr Bennett went on: "We see precious little action by successive governments in between floods and droughts to put long term measures in places and have a strategic response to this."

He called on the government to use planning regimes to make sure infrastructure was built in a way that did not put more demand on water resources.

For example, he said housing developments were being built where there was already "extreme pressure on water resources".

The Environment Agency said the specific areas of the Anglian region suffering from a drought were Lincolnshire, Cambridgeshire, parts of Bedfordshire and Northamptonshire and western Norfolk.